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如何更快地查询这 2000 万条记录视图?

对于搜索功能,我使用的视图包含我需要搜索的所有表中的记录。该视图有近 2000 万条记录。针对这种观点的搜索花费了太多时间。

我应该在哪里寻找改善此视图的性能?

视图的粗略定义如下。它包括十三张桌子和大约三十个字段。

CREATE VIEW [dbo].[v_AllForSearch]
AS
SELECT 
  FT.firstField AS [firstField]
, FT.fld_primary AS [fld_primary]
, FT.fld_thirdField AS [thirdField]
, FT.fld_fourthField AS [fourthField]           
, ISNULL(ST.[fld_firstSearchField],'') AS [firstSearchField]
, ISNULL(TT.[fld_thirdSearch],'') AS thirdSearch
, ISNULL(TT.[fld_fourthSearch],'')AS fourthSearch
, ISNULL(TT.[fld_fifthSearch],'')AS fifthSearch
, ISNULL(FRT.[fld_sixthSearch],'') As [sixthSearch]
, ISNULL(FRT.[fld_seventhSearch],'') AS [seventhSearch]
, ISNULL(FRT.[fld_eightSearch],'')AS [eightSearch]
, ISNULL(FIT.[fld_nineSearch],'') AS [nineSearch]
, ISNULL(SIT.[fld_tenthSearch],'')AS [tenthSearch]
, ISNULL(SET.[fld_eleventhSearch],'') AS [eleventhSearch]
, ISNULL(ET.[twelthSearch],'')AS [twelthSearch]
, ISNULL(NT.[thirteenthSearch],'')AS [thirteenthSearch]
, ISNULL(NT.[fourteenSearch],'') AS [fourteenSearch]
, ISNULL(NT.[fifteenSearch],'') AS [fifteenSearch]
, ISNULL(NT.[sxteenSearch],'')  AS [sxteenSearch]
, …
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index sql-server optimization view

14
推荐指数
3
解决办法
8112
查看次数

LIKE 选择文本中任意位置独立存在的单词

在此处输入图片说明

我有一个包含以下文本的表格,我要搜索的关键字是“搜索”。所以我写了一个查询

SELECT [ID]
  ,[TextValue]
FROM
   [dbo].[SearchLike]
WHERE
   [TextValue] LIKE '%Search%'
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Q.1如何修改查询,以便只返回文本中包含“搜索”的记录,而不是使用“LSearch”。即根据图像前三个记录只返回。?

sql-server-2008 query pattern-matching

7
推荐指数
2
解决办法
6008
查看次数

从 NTEXT 迁移到 NVARCHAR(MAX)

我有类型为列的表NTEXT。并且由于某些特殊原因,客户端希望将列类型迁移到NVARCHAR(MAX).

这样做时,我应该注意哪些潜在威胁?

限制是否有数据丢失的可能性NVARCHAR(MAX)

sql-server datatypes alter-table type-conversion

5
推荐指数
2
解决办法
2718
查看次数